<p> Quiz Unit 2, Lessons 3, 4, 5 Additional Practice and Notes on what’s on quiz ANSWERS AT END OF DOCUMENT</p><p>What’s on quiz: - Black and white images - Color images - Lossy and lossless compression - File types - Heuristic - metadata</p><p>Questions are below, answer key at end. NOTE: separate document for Hexadecimal, Binary, decimal conversion practice</p><p>NOTE: FOR ALL QUESTIONS ABOUT IMAGE SIZE, ASSUME THAT METADATA IS: - One byte for width - One byte for height - One byte for bits-per-pixel (only for color)</p><p>1. How many bytes are required to encode an image that is 40 pixels wide and 40 pixels tall, if you encode each pixel with 3 bytes (24 bits) of RGB data? </p><p>2. How many byes would it take to represent a black and white image that is 40 pixels by 40 pixels</p><p>3. A digital artist comes up to you and says, “Help! I need a 24-bit color that’s ‘less blue’ than #2233FF.” What would you tell her? </p><p>Assume 3 bits per color (or a total of 9 bits) for these questions on RGB:</p><p>4. Which color will be a brighter blue? a. 001001111 b. 100111100</p><p>5. Which color will be a darker green? a. 001111000 b. 001010001 Match the file type with the definition</p><p>Hexidecimal, binary, decimal conversion practice – see separate pdf document. NOTE: PDF contains “0x” as a prefix for every hexadecimal number. That’s just a prefix and should not be included in your conversion. ANSWERS</p><p>6. How many bytes are required to encode an image that is 40 pixels wide and 40 pixels tall, if you encode each pixel with 3 bytes (24 bits) of RGB data? a. 40 * 40 = 1600 b. 1600 pixels *3 bytes = 4800 c. Add in 3 bytes of data for metadata d. Total: 4803</p><p>7. How many byes would it take to represent a black and white image that is 40 pixels by 40 pixels</p><p> a. 40*40 – 1600 b. Add in 3 bytes of data for metadata c. Total: 1603</p><p>8. A digital artist comes up to you and says, “Help! I need a 24-bit color that’s ‘less blue’ than #2233FF.” What would you tell her? </p><p> a. #2233FE or #2233EE</p><p>Assume 3 bits per color (or a total of 9 bits) for these questions on RGB:</p><p>9. Which color will be a brighter blue? c. 001001111 **** d. 100111100</p><p>10. Which color will be a darker green? c. 001111000 d. 001010001 ****</p><p>Answers to match the file type with the definition Hexidecimal, binary, decimal conversion practice – see separate pdf document. NOTE: PDF contains “0x” as a prefix for every hexadecimal number. That’s just a prefix and should not be included in your conversion.</p>